How to open backup file?

[Tut]

Using the Backup function in Manager most definitely does not save anything as a PDF. It saves it with a .manager extension. Read the Guide:

Make a backup of existing business

Before you start working with Manager, it’s important for you to know how to backup your future accounting data. Backups will allow you to restore the original data after a data loss event. As long as new accounting data is being recorded, backups will need to be performed at frequent intervals. The most common method of performing a backup of Manager is to use the Backup button in the top-right corner when working with an accounting entity. Example Let’s try to backup a business named “Bril…

As stated above in this thread, you cannot open that file. You can only import it on a computer running Manager. See the Guide:

Import a sample business

If you’d like to experiment with a sample business already containing a broad range of transactions, you can import a fictitious company called Northwind Traders. Northwind is a trading company selling food to customers all over the world. Manager has a lot of modules and the way Northwind is using Manager is just one of the many examples of how Manager can suit custom business requirements. Northwind is using Manager to: Track supplier invoices to know how much it owes to suppliers Issue inv…